Design Of Single Vehicle Debugging System For Transnational Interconnection

This paper completes the design and implementation of a single vehicle debugging system for Philadelphia metro trains based on real-time Ethernet control.This debugging system is composed of a single-car simulator of the lower computer and a debugging software of the upper computer.The lower computer and the upper computer of the single-car debugging system use wired and wireless real-time Ethernet for internal communication.The lower machine debugging tester uses STM32 microcontroller as the main control chip,and cooperates with the design of auxiliary circuit.The W5500 Ethernet communication chip and USRWIFI232-B2 WIFI module are used to realize the Ethernet communication function of the data in the debugging system.RSM485 ECHT,CY8C9520A and other chips are used to build serial communication module,IO interface circuit,external storage module,and system power module.Each module cooperates to realize the design function of hardware part of debugging simulator.The tester realizes the transmission and reception of the train centralized control signal under the control of the host computer through the control and communication of two hard lines in each single workshop of the train to connect with the car body,so as to realize the debugging of the control function of the single hard line.In order to control the debug tester and debug the train network function,this paper uses JAVA language,MySQL database,JNI local interface and other technologies to design the single vehicle debugging software based on the Eclipse development environment.In order to realize the control and debugging of the in-vehicle network system,this paper designs the corresponding dynamic link library of the local TRDP communication function on the basis of the research on the TRDP data communication,and realizes the integrated call of the debugging software to the TRDP function through the JNI local interface technology.Thus,the upper computer can interact with the data of the vehicle network switch through the driver software,and work together with the single vehicle debugging simulator to realize the complete debugging function of the single vehicle debugging system.